#region The MIT License
// The MIT License
// 
// Copyright (c) 2009 octalforty studios
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#endregion
using System;
using System.ComponentModel.Composition.Hosting;

namespace octalforty.Componento.ComponentModel
{
    /// <summary>
    /// MEF-based implementation of the <see cref="IServiceProvider"/>.
    /// </summary>
    internal sealed class ServiceProvider : IServiceProvider
    {
        #region Private Fields
        private readonly CompositionContainer compositionContainer;
        #endregion

        /// <summary>
        /// Initializes a new instance of the <see cref="ServiceProvider"/> class.
        /// </summary>
        /// <param name="compositionContainer"></param>
        public ServiceProvider(CompositionContainer compositionContainer)
        {
            this.compositionContainer = compositionContainer;
        }

        #region IServiceProvider Members
        /// <summary>
        /// Gets the service object of the specified type.
        /// </summary>
        /// <returns>
        /// A service object of type serviceType.-or- null if there is no service object of type serviceType.
        /// </returns>
        /// <param name="serviceType">An object that specifies the type of service object to get. </param>
        public object GetService(Type serviceType)
        {
            return compositionContainer.GetExportedValue<object>(serviceType.FullName);
        }

        /// <summary>
        /// Gets the service object of the specified type.
        /// </summary>
        /// <returns>
        /// A service object of type <typeparamref name="T"/>
        /// </returns>
        /// <typeparam name="T"></typeparam>
        public T GetService<T>()
        {
            return compositionContainer.GetExportedValue<T>();
        }
        #endregion
    }
}